Yin and Yang: The Sun and Moon are often seen as complementary forces—light and dark, active and passive, masculine and feminine, conscious and unconscious. They are often described as the dualistic balance needed for harmony in the universe. In Taoism, the concept of Yin (the Moon) and Yang (the Sun) represents the balance of opposites, which is essential for spiritual wholeness and cosmic order. Can be used as sketchpad as well as journal.